Diagnostic accuracy of transabdominal ultrasound

Målet i denne prospektive studien var å evaluere den diagnostiske presisjonen ved morderne ultralyd sammenlignet med «Mayo-score» ved kronisk pankreatitt. 

Abstract

The performance of transabdominal ultrasound (US) in chronic pancreatitis (CP) following the advances in US technology made during recent decades has not been explored. Our aim in this prospective study was to evaluatethe diagnostic accuracy ofmodern abdominal US compared with theMayo score inCP.One hundred thirty-fourpatients referred for suspected CP were included in the study. Fifty-four patients were assigned the diagnosis CP.

After inclusion, transabdominal US was performed. Ductal features (calculi, dilations and caliber variations, sidebranchdilations and hyper-echoic duct wall margins) and parenchymal features (calcifications, cysts, hyperechoicfoci, stranding, lobulation and honeycombing) were recorded. Features were counted and scored accordingto a weighting system defined at the international consensus meeting in Rosemont, Illinois (Rosemont score).

Diagnostic performance indices (95% confidence interval) of US were calculated: The unweighted count of features had asensitivity of 0.69 (0.54–0.80) and specificity of 0.97 (0.90–1). The Rosemont score had a sensitivity of 0.81 (0.69–0.91) and specificity of 0.97 (0.90–1). Exocrine pancreatic failure was most pronounced in Rosemont groups I and II (p , 0.001). We conclude that using both unweighted and weighted scores, the diagnostic accuracy of modern transabdominalUS is good. The extent of pancreatic changes detected by the method is correlated with exocrine pancreatic function.


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